CN115800919B - Mechanical load performance test method and device for photovoltaic module - Google Patents
Mechanical load performance test method and device for photovoltaic module Download PDFInfo
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- CN115800919B CN115800919B CN202310014986.7A CN202310014986A CN115800919B CN 115800919 B CN115800919 B CN 115800919B CN 202310014986 A CN202310014986 A CN 202310014986A CN 115800919 B CN115800919 B CN 115800919B
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Abstract
The invention provides a mechanical load performance test method and device of a photovoltaic module, wherein the method comprises the following steps: firstly, performing power test, appearance test and insulation test on a target photovoltaic module in a dry environment to generate an initial power test result, an initial appearance test result and an initial insulation test result, then performing at least one round of wet environment test on the target photovoltaic module to generate an intermediate insulation test result and an intermediate appearance test result if the initial power test result, the initial appearance test result and the initial insulation test result are all qualified results, performing final power test on the target photovoltaic module in the dry environment to generate a final power test result, and finally, generating a mechanical load resistance test result of the target photovoltaic module according to the initial power test result and the final power test result. The invention can improve the accuracy of the mechanical load test result of the photovoltaic module.
Description
Technical Field
The invention relates to the technical field of detection of photovoltaic modules, in particular to a method and a device for testing mechanical load performance of a photovoltaic module.
Background
The photovoltaic module is a core part in a photovoltaic power generation system and is also the most valuable part in the photovoltaic power generation system. The mechanical load test is one of important detection items of the photovoltaic module, and is used for determining the capability of the photovoltaic module for bearing the minimum static load and verifying the capability of the photovoltaic module for bearing wind, snow or ice coating loads under different installation angles.
The existing mechanical load testing method has the problem of incomplete testing, so that the mechanical load testing result of the photovoltaic module is inaccurate.
Disclosure of Invention
The embodiment of the invention provides a mechanical load performance test method and device for a photovoltaic module, which are used for solving the problem that the existing mechanical load test method is incomplete in test.
In a first aspect, an embodiment of the present invention provides a method for testing mechanical load performance of a photovoltaic module, including:
performing a first power test, a first appearance test and a first insulation test on the target photovoltaic module in a dry environment to generate an initial power test result, an initial appearance test result and an initial insulation test result;
if the initial power test result, the initial appearance test result and the initial insulation test result are all qualified results, carrying out at least one round of following wet environment test on the target photovoltaic module:
S1, sprinkling water for a first preset time on the front and back surfaces of a target photovoltaic module for the first time, then applying a test load and a system voltage with preset times to the target photovoltaic module for a second preset time upwards, recording a resistance value and a deformation displacement value of the target photovoltaic module, and generating an intermediate insulation test result and an intermediate appearance test result of the target photovoltaic module according to the recorded resistance value and deformation displacement value; if the intermediate insulation test result and the intermediate appearance test result in the step S1 are both qualified results, continuing to carry out the step S2, otherwise, generating a test result with unqualified mechanical load resistance of the target photovoltaic module; s2, spraying water for the first preset time duration on the front and back surfaces of the target photovoltaic module for the second time, then applying a test load and a system voltage with preset multiples to the target photovoltaic module downwards for the second preset time duration, recording the resistance value and the deformation displacement value of the target photovoltaic module again, and generating an intermediate insulation test result and an intermediate appearance test result of the target photovoltaic module again according to the recorded resistance value and deformation displacement value of the target photovoltaic module again;
if all the intermediate insulation test results and intermediate appearance test results in at least one round of wet environment test are qualified results, performing final power test on the target photovoltaic module in a dry environment to generate a final power test result;
And generating a mechanical load resistance test result of the target photovoltaic module according to the initial power test result and the final power test result.
In one possible implementation, if the initial power test value in the initial power test results is greater than the preset power threshold, the initial power test result is a qualified result, otherwise the initial power test result is a disqualified result;
if the initial appearance test result is that the preset appearance defect does not exist, the initial appearance test result is a qualified result, otherwise, the initial appearance test result is a disqualified result;
if the initial insulation value in the initial insulation test result is larger than the preset insulation threshold value, the initial insulation test result is a qualified result, otherwise, the initial insulation test result is a disqualified result.
In one possible implementation, after generating the initial power test result, the initial appearance test result, and the initial insulation test result, if there is a failure result in the initial power test result, the initial appearance test result, and the initial insulation test result, a test result that fails in the mechanical load resistance of the target photovoltaic module is generated.
In one possible implementation, generating a mechanical load resistance test result of the target photovoltaic module according to the initial power test result and the final power test result includes:
Generating a power attenuation rate according to the initial power test result and the final power test result;
if the power attenuation rate is smaller than the preset attenuation threshold, generating a test result with qualified mechanical load resistance of the target photovoltaic module, otherwise, generating a test result with unqualified mechanical load resistance of the target photovoltaic module.
In one possible implementation manner, before the first power test, the first appearance test and the first insulation test are performed on the target photovoltaic module in the dry environment, the target photovoltaic module is fixed on the mechanical load testing machine according to a preset fixing mode, and the sucking discs of the mechanical load testing machine are uniformly distributed on the surface of the target photovoltaic module.
In one possible implementation manner, when water is sprayed on the front and back surfaces of the target photovoltaic module for a first preset time, other surfaces of the target photovoltaic module except for the positions adsorbed by the suckers are completely covered by water;
when water is sprayed on the front and back surfaces of the target photovoltaic module for the first preset time, other surfaces of the target photovoltaic module except the positions adsorbed by the suckers are completely covered by water.
In one possible implementation, the displacement testing device of the mechanical load testing machine is cleared prior to the first round of wet environment testing of the target photovoltaic module.
In one possible implementation, at least one round of wet environment testing is performed on the target photovoltaic module, and the method further includes:
if the two intermediate insulation test results and the two intermediate appearance test results of the first round of wet environment test are qualified results, the second round of wet environment test is carried out on the target photovoltaic module;
and if the two intermediate insulation test results and the two intermediate appearance test results of the second-round wet environment test are both qualified results, performing a third-time wet environment test on the target photovoltaic module.
In one possible implementation, the preset multiple is 1.
In a second aspect, an embodiment of the present application provides a test device for mechanical load performance of a photovoltaic module, including:
the initial testing module is used for performing a first power test, a first appearance test and a first insulation test on the target photovoltaic module in a dry environment to generate an initial power test result, an initial appearance test result and an initial insulation test result;
the intermediate test module is used for carrying out at least one round of following wet environment test on the target photovoltaic module when the initial power test result, the initial appearance test result and the initial insulation test result are all qualified results:
S1, sprinkling water for a first preset time on the front and back surfaces of a target photovoltaic module for the first time, then applying a test load and a system voltage with preset times to the target photovoltaic module for a second preset time upwards, recording a resistance value and a deformation displacement value of the target photovoltaic module, and generating an intermediate insulation test result and an intermediate appearance test result of the target photovoltaic module according to the recorded resistance value and deformation displacement value; if the intermediate insulation test result and the intermediate appearance test result in the step S1 are both qualified results, continuing to carry out the step S2, otherwise, generating a test result with unqualified mechanical load resistance of the target photovoltaic module; s2, spraying water for the first preset time duration on the front and back surfaces of the target photovoltaic module for the second time, then applying a test load and a system voltage with preset multiples to the target photovoltaic module downwards for the second preset time duration, recording the resistance value and the deformation displacement value of the target photovoltaic module again, and generating an intermediate insulation test result and an intermediate appearance test result of the target photovoltaic module again according to the recorded resistance value and deformation displacement value of the target photovoltaic module again;
the final testing module is used for carrying out final power testing on the target photovoltaic module in a dry environment when all intermediate insulation testing results and intermediate appearance testing results in at least one round of wet environment testing are qualified results, so as to generate a final power testing result;
And the test result generation module is used for generating a test result of the mechanical load resistance of the target photovoltaic module according to the initial power test result and the final power test result.
In one possible implementation, if the initial power test value in the initial power test results is greater than the preset power threshold, the initial power test result is a qualified result, otherwise the initial power test result is a disqualified result;
if the initial appearance test result is that the preset appearance defect does not exist, the initial appearance test result is a qualified result, otherwise, the initial appearance test result is a disqualified result;
if the initial insulation value in the initial insulation test result is larger than the preset insulation threshold value, the initial insulation test result is a qualified result, otherwise, the initial insulation test result is a disqualified result.
In one possible implementation, if there is a failure in the initial power test result, the initial appearance test result, and the initial insulation test result, a test result is generated that fails the mechanical load resistance of the target photovoltaic module.
In one possible implementation, the initial test module is further configured to:
generating a power attenuation rate according to the initial power test result and the final power test result;
If the power attenuation rate is smaller than the preset attenuation threshold, generating a test result with qualified mechanical load resistance of the target photovoltaic module, otherwise, generating a test result with unqualified mechanical load resistance of the target photovoltaic module.
In one possible implementation, the initial test module is further configured to:
and fixing the target photovoltaic module on the mechanical load testing machine according to a preset fixing mode, and uniformly distributing sucking discs of the mechanical load testing machine on the surface of the target photovoltaic module.
In one possible implementation, the intermediate test module is further configured to:
when water is sprayed on the front and back surfaces of the target photovoltaic module for a first preset time, other surfaces except for the positions adsorbed by the suckers on the target photovoltaic module are completely covered by water;
when water is sprayed on the front and back surfaces of the target photovoltaic module for the first preset time, other surfaces of the target photovoltaic module except the positions adsorbed by the suckers are completely covered by water.
In one possible implementation, the intermediate test module is further configured to zero out the displacement test device of the mechanical load testing machine.
In one possible implementation, the intermediate test module is specifically configured to:
If the two intermediate insulation test results and the two intermediate appearance test results of the first round of wet environment test are qualified results, the second round of wet environment test is carried out on the target photovoltaic module;
and if the two intermediate insulation test results and the two intermediate appearance test results of the second-round wet environment test are both qualified results, performing a third-time wet environment test on the target photovoltaic module.
In one possible implementation, the preset multiple is 1.
The invention provides a mechanical load performance test method and device for a photovoltaic module, which are characterized in that a power test, an appearance test and an insulation test are carried out on the target photovoltaic module in a dry environment, an initial power test result, an initial appearance test result and an initial insulation test result are generated, whether three initial test results of the target photovoltaic module are qualified results is judged, then, when all three initial test results of the target photovoltaic module are qualified results, at least one round of wet insulation test is carried out on the target photovoltaic module, test loads and system voltages are applied to two angles of the target photovoltaic module, the mechanical load performance of the photovoltaic module under different installation angles, which is subjected to rain and snow or ice, can be detected, at least one round of wet insulation test can be carried out, the test accuracy can be improved, and when all the wet insulation test results of at least one round of wet insulation test result are qualified results, the final power test is carried out on the target photovoltaic module in the dry environment, and the mechanical load performance test results of the target photovoltaic module are generated according to the initial power test results and the final power test results, so that the mechanical load performance of the photovoltaic module under rain and ice conditions can be simulated, and the mechanical load performance of the photovoltaic module under rain and ice conditions can be further improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart of an implementation of a method for testing mechanical load performance of a photovoltaic module according to an embodiment of the present invention;
FIG. 2 is a flow chart of a wet environment test for a target photovoltaic module provided by an embodiment of the present invention;
fig. 3 is a structural diagram of a mechanical load performance test device for a photovoltaic module according to an embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the following description will be made by way of specific embodiments with reference to the accompanying drawings.
As described in the related art, in recent years, photovoltaic industry has rapidly developed, photovoltaic power generation has been widely used, and a photovoltaic module is likened to be a heart of a photovoltaic system, which can convert solar energy into electric energy, and realize photovoltaic power generation.
With the continuous expansion of the terminal market, new materials and new technologies are continuously appeared, and the photovoltaic modules are applied to wider areas and more complex environments, which simultaneously require deeper understanding of the performance of the products. Only more familiar with the actual performance of the product in various environments can the efficient and reliable photovoltaic module product be provided for customers.
Mechanical load testing is one of the important test items of photovoltaic modules, and is intended to determine the ability of the module to withstand external stresses, and to verify the ability of the module to withstand wind, snow or ice loading at different mounting angles. However, the existing mechanical load testing method has the problem of incomplete testing, and the main popular load testing methods comprise static load and dynamic load, wherein the testing methods are all used for testing when the mechanical load of the photovoltaic module is in a dry environment, the load performance of the photovoltaic module in rainy, snowy or humid environments cannot be detected, the problem of incomplete testing exists, and the inaccurate mechanical load testing result of the photovoltaic module can be caused.
In order to solve the problems in the prior art, the embodiment of the invention provides a mechanical load performance test method of a photovoltaic module. The following first describes a method for testing mechanical load performance of a photovoltaic module provided by the embodiment of the present invention.
As shown in fig. 1, the method for testing the mechanical load performance of the photovoltaic module provided by the embodiment of the invention comprises the following steps:
and 110, performing a first power test, a first appearance test and a first insulation test on the target photovoltaic module in a dry environment to generate an initial power test result, an initial appearance test result and an initial insulation test result.
In some embodiments, a photovoltaic module having no apparent defect in appearance is taken as the target photovoltaic module.
In some embodiments, in the mechanical performance testing process of the photovoltaic module, if the insulation value is lower than the threshold value or fails, the system is at risk of electric leakage, and electrification of the casing of the electric equipment may occur, so that potential safety hazards are generated for personal safety. Meanwhile, the fault point discharges to the ground to cause local heating or electric spark, and potential safety hazards such as fire disaster and the like are easily caused to the system. Therefore, the problem of low insulation is found in time, the reliable operation of the system can be guaranteed, and the predictable power generation loss can be indirectly reduced.
In some embodiments, the photovoltaic module power test is to determine the maximum power of the module before and after stability and various environmental stress tests. The amount of generated energy of the photovoltaic module depends on the power of the module, so that the power of the photovoltaic module is judged, the power of the photovoltaic module is known first, some manufacturers virtually mark the power of the photovoltaic module for benefit, or some photovoltaic modules are manufactured for quality reasons, the power attenuation is serious, and therefore, the determination of the current power of the photovoltaic module is very important.
In some embodiments, performing a first insulation test on a target photovoltaic module, the specific process of generating an initial insulation test result includes:
connecting a connector of the target photovoltaic module in parallel to an anode of the test voltage, and fixing a cathode of the test voltage on a grounding hole of the target photovoltaic module by using a fixing bolt; and performing an insulation test on the target photovoltaic module, recording an initial resistance value measured by the insulation test, measuring the area of the target photovoltaic module, calculating an initial insulation value according to the initial resistance value and the area, and generating an initial insulation test result.
S1, sprinkling water for a first preset time on the front and back surfaces of a target photovoltaic module for the first time, then applying a test load and a system voltage with preset times to the target photovoltaic module for a second preset time upwards, recording a resistance value and a deformation displacement value of the target photovoltaic module, and generating an intermediate insulation test result and an intermediate appearance test result of the target photovoltaic module according to the recorded resistance value and deformation displacement value; if the intermediate insulation test result and the intermediate appearance test result in the step S1 are both qualified results, continuing to carry out the step S2, otherwise, generating a test result with unqualified mechanical load resistance of the target photovoltaic module; s2, spraying water for the first preset time for the front and back surfaces of the target photovoltaic module for the second time, then applying a test load and a system voltage with preset multiples for the second preset time for the target photovoltaic module downwards, recording the resistance value and the deformation displacement value of the target photovoltaic module again, and generating an intermediate insulation test result and an intermediate appearance test result of the target photovoltaic module again according to the recorded resistance value and deformation displacement value of the target photovoltaic module again.
Fig. 2 shows a flow chart of the wet environment test of the target photovoltaic module in step 120.
In some embodiments, in the step 120, when the front and back surfaces of the target photovoltaic module are sprayed with water for a first preset period of time, the sprayed water may be rainwater, snow water, tap water, purified water, or the like.
In some embodiments, in step 120, an intermediate insulation value is calculated according to the resistance value, the area of the target photovoltaic module, and a preset formula, and an intermediate insulation test result is generated.
In some embodiments, if the intermediate insulation value in the intermediate insulation test result is greater than or equal to a preset wet insulation threshold, the intermediate insulation test result is determined to be a qualified result, and if the intermediate insulation value in the intermediate insulation test result is less than the wet insulation threshold, the intermediate insulation test result is determined to be a disqualified result.
In some embodiments, if the deformation displacement value in the intermediate appearance test result is less than the preset deformation displacement threshold value and the appearance of the target photovoltaic module has no obvious defect, the intermediate appearance test result is a qualified result, otherwise the intermediate appearance test result is a disqualified result.
And 130, if all the intermediate insulation test results and the intermediate appearance test results in at least one round of wet environment test are qualified results, performing final power test on the target photovoltaic module in a dry environment to generate a final power test result.
In some embodiments, the target photovoltaic module may be removed from the mechanical load testing machine and the surface of the target photovoltaic module wiped clean prior to final power testing of the target photovoltaic module in a dry environment.
And 140, generating a mechanical load resistance test result of the target photovoltaic module according to the initial power test result and the final power test result.
In some embodiments, the specific process of step 110 may be as follows:
if the initial power test value in the initial power test result is larger than the preset power threshold value, the initial power test result is a qualified result, otherwise, the initial power test result is a disqualified result; if the initial appearance test result is that the preset appearance defect does not exist, the initial appearance test result is a qualified result, otherwise, the initial appearance test result is a disqualified result; if the initial insulation value in the initial insulation test result is larger than the preset insulation threshold value, the initial insulation test result is a qualified result, otherwise, the initial insulation test result is a disqualified result.
In some embodiments, if the initial appearance test result is that the preset appearance defect exists, the load resistance performance of the target photovoltaic module is poor, the target photovoltaic module is at risk of frame detachment, and the initial appearance test result is a disqualified result.
In some embodiments, after the initial power test result, the initial appearance test result, and the initial insulation test result are generated in the step 110, if the initial power test result, the initial appearance test result, and the initial insulation test result have failed results, a test result that fails the mechanical load resistance of the target photovoltaic module is generated.
In some embodiments, the specific process of generating the mechanical load resistance test result of the target photovoltaic module according to the initial power test result and the final power test result in the step 110 may be as follows:
generating a power attenuation rate according to the initial power test result and the final power test result, generating a test result with qualified mechanical load resistance of the target photovoltaic module if the power attenuation rate is smaller than a preset attenuation threshold, and generating a test result with unqualified mechanical load resistance of the target photovoltaic module if the power attenuation rate is smaller than the preset attenuation threshold.
In some embodiments, the power attenuation of the photovoltaic module refers to a phenomenon that the output power of the photovoltaic module continuously decreases with the increase of illumination time, and the power attenuation of the photovoltaic module directly relates to the power generation efficiency of the module. And if the power attenuation value of the photovoltaic module is too large, the photovoltaic module is unqualified in mechanical resistance.
In some embodiments, the power decay rate is generated from an initial power test value in the initial power test result, a final power test value in the final power test result, and a preset power decay formula.
Specifically, the preset power attenuation formula is:
in some embodiments, the preset decay threshold is 5%.
In some embodiments, after step 130, it is first determined whether the final power test result is a qualified result. If the final power result is a qualified result, the above step 140 is performed.
Specifically, if the final power test value in the final power test result is judged to be larger than the preset power threshold, the final power test result is a qualified result, otherwise, the final power test result is a disqualified result.
In some embodiments, the preset wet insulation threshold is 40mΩ.
In some embodiments, before the first insulation test is performed on the target photovoltaic module in the dry environment, the target photovoltaic module is fixed on the mechanical load testing machine in a preset fixing manner, and the suction cups of the mechanical load testing machine are uniformly distributed on the surface of the target photovoltaic module.
In some embodiments, the mechanical load test may be performed using a solar photovoltaic module mechanical load testing machine that may determine the ability of the module to withstand static, dynamic loads such as wind, snow, or ice coating at different mounting angles. The method is widely used for detecting the compressive strength of the solar photovoltaic module, adopts a dynamic pressure holding technology, simulates a load experiment, and is used for knowing the compressive capacity of the product in a load state.
In some embodiments, the target photovoltaic module may be secured to the movable member first, and then the movable member secured by the target photovoltaic module may be secured to the mechanical load testing machine.
Specifically, the photovoltaic module can be fixed on the movable piece in various modes such as bolts, clamps, beams and the like, and can also be installed according to the installation mode in the actual use environment of the photovoltaic module.
In some embodiments, when water is sprayed on the front and back surfaces of the target photovoltaic module for a first preset time, other surfaces of the target photovoltaic module except for the positions adsorbed by the suckers are completely covered by water; when water is sprayed on the front and back surfaces of the target photovoltaic module for the first preset time, other surfaces of the target photovoltaic module except the positions adsorbed by the suckers are completely covered by water.
In some embodiments, the displacement testing device of the mechanical load testing machine needs to be cleared prior to performing step 120 described above.
In some embodiments, if the intermediate insulation test result and the intermediate appearance test result of the first round of wet environment test are both qualified results, the second round of wet environment test can be performed on the target photovoltaic module, and if the intermediate insulation test result and the intermediate appearance test result of the second round of wet environment test are both qualified results, the third round of wet environment test can be performed on the target photovoltaic module.
Specifically, three wet environment tests may be performed on the target photovoltaic module.
In some embodiments, when the test load is applied to the target photovoltaic module in the step 120 for the second preset period of time and the system voltage is applied by the preset multiple, the preset multiple may be 1 time.
In some embodiments, the first preset time period may be 10 minutes, 15 minutes, or 18 minutes, and the second preset time period may be 50 minutes, 60 minutes, or 70 minutes.
In some embodiments, when the wet environment test is performed, if the appearance of the target photovoltaic module is found to have a significant defect within the second preset time period, the application of the test load and the system voltage of the preset multiple to the target photovoltaic module is stopped.
In the embodiment of the invention, the power test, the appearance test and the insulation test are firstly carried out on the target photovoltaic module in a dry environment, an initial power test result, an initial appearance test result and an initial insulation test result are generated, whether three initial test results of the target photovoltaic module are qualified results or not is judged, then, when all three initial test results of the target photovoltaic module are qualified results, at least one round of wet insulation test is carried out on the target photovoltaic module, test loads and system voltages are applied to two angles of the target photovoltaic module, the mechanical load performance of the photovoltaic module under different installation angles when the photovoltaic module is subjected to rain and snow or ice coating can be detected, at least one round of wet insulation test can be carried out, the test accuracy can be improved, when all the wet insulation test results of at least one round of wet insulation test are qualified results, the final power test is carried out on the target photovoltaic module in the dry environment, the final power test result is generated, and the mechanical load resistance performance test result of the target photovoltaic module is generated according to the initial power test results and the final power test results, and the mechanical load performance of the target photovoltaic module under the rain and snow or wet environment can be simulated, so that the test accuracy can be more comprehensively improved.
It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic, and should not limit the implementation process of the embodiment of the present invention.
The following are device embodiments of the invention, for details not described in detail therein, reference may be made to the corresponding method embodiments described above.
As shown in fig. 3, the mechanical load performance test device of the photovoltaic module includes:
the initial testing module 310 is configured to perform a first power test, a first appearance test, and a first insulation test on the target photovoltaic module in a dry environment, and generate an initial power test result, an initial appearance test result, and an initial insulation test result.
The intermediate test module 320 is configured to perform at least one round of the following wet environment test on the target photovoltaic module when the initial power test result, the initial appearance test result, and the initial insulation test result are all qualified results:
s1, sprinkling water for a first preset time on the front and back surfaces of a target photovoltaic module for the first time, then applying a test load and a system voltage with preset times to the target photovoltaic module for a second preset time upwards, recording a resistance value and a deformation displacement value of the target photovoltaic module, and generating an intermediate insulation test result and an intermediate appearance test result of the target photovoltaic module according to the recorded resistance value and deformation displacement value; if the intermediate insulation test result and the intermediate appearance test result in the step S1 are both qualified results, continuing to carry out the step S2, otherwise, generating a test result with unqualified mechanical load resistance of the target photovoltaic module; s2, spraying water for the first preset time for the front and back surfaces of the target photovoltaic module for the second time, then applying a test load and a system voltage with preset multiples for the second preset time for the target photovoltaic module downwards, recording the resistance value and the deformation displacement value of the target photovoltaic module again, and generating an intermediate insulation test result and an intermediate appearance test result of the target photovoltaic module again according to the recorded resistance value and deformation displacement value of the target photovoltaic module again.
And the final test module 330 is configured to perform a final power test on the target photovoltaic module in a dry environment when all the intermediate insulation test results and the intermediate appearance test results in at least one round of wet environment test are qualified results, and generate a final power test result.
The test result generating module 340 is configured to generate a test result of mechanical load resistance of the target photovoltaic module according to the initial power test result and the final power test result.
In some embodiments, if the initial power test value in the initial power test results is greater than the preset power threshold, the initial power test results are qualified results, otherwise the initial power test results are unqualified results;
if the initial appearance test result is that the preset appearance defect does not exist, the initial appearance test result is a qualified result, otherwise, the initial appearance test result is a disqualified result;
if the initial insulation value in the initial insulation test result is larger than the preset insulation threshold value, the initial insulation test result is a qualified result, otherwise, the initial insulation test result is a disqualified result.
In some embodiments, if there is a failure result for the initial power test result, the initial appearance test result, and the initial insulation test result, a test result is generated that fails the mechanical load resistance performance of the target photovoltaic module.
In some embodiments, the initial test module is further to:
generating a power attenuation rate according to the initial power test result and the final power test result;
if the power attenuation rate is smaller than the preset attenuation threshold, generating a test result with qualified mechanical load resistance of the target photovoltaic module, otherwise, generating a test result with unqualified mechanical load resistance of the target photovoltaic module.
In some embodiments, the initial test module is further to:
and fixing the target photovoltaic module on the mechanical load testing machine according to a preset fixing mode, and uniformly distributing sucking discs of the mechanical load testing machine on the surface of the target photovoltaic module.
In some embodiments, the intermediate test module is further to:
when water is sprayed on the front and back surfaces of the target photovoltaic module for a first preset time, other surfaces except for the positions adsorbed by the suckers on the target photovoltaic module are completely covered by water;
when water is sprayed on the front and back surfaces of the target photovoltaic module for the first preset time, other surfaces of the target photovoltaic module except the positions adsorbed by the suckers are completely covered by water.
In some embodiments, the intermediate test module is further configured to zero out a displacement test device of the mechanical load testing machine.
In some embodiments, the intermediate test module is specifically configured to:
if the two intermediate insulation test results and the two intermediate appearance test results of the first round of wet environment test are qualified results, the second round of wet environment test is carried out on the target photovoltaic module;
and if the two intermediate insulation test results and the two intermediate appearance test results of the second-round wet environment test are both qualified results, performing a third-time wet environment test on the target photovoltaic module.
In some embodiments, the preset factor is 1.
According to the testing device for the mechanical load performance of the photovoltaic module, the power test, the appearance test and the insulation test are firstly carried out on the target photovoltaic module in a dry environment, an initial power test result, an initial appearance test result and an initial insulation test result are generated, whether three initial test results of the target photovoltaic module are qualified results is judged, then, when all three initial test results of the target photovoltaic module are qualified results, at least one round of wet insulation test is carried out on the target photovoltaic module, test loads and system voltages are applied to two angles of the target photovoltaic module, the mechanical load performance of the photovoltaic module under different installation angles when the photovoltaic module is subjected to rain and snow or ice coating can be detected, at least one round of wet insulation test can be carried out, the testing accuracy can be improved, when all the wet insulation test results of at least one round of wet insulation test result are qualified results, the final power test is carried out on the target photovoltaic module in the dry environment, the final power test result is generated, the mechanical load resistance performance test result of the target photovoltaic module is generated according to the initial power test result and the final power test result, the mechanical load performance of the target photovoltaic module can be simulated, the mechanical load performance of the photovoltaic module under the raining, snowing or wet environment can be further improved, and the testing accuracy can be further improved.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, i.e. the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-described functions. The functional units and modules in the embodiment may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit, where the integrated units may be implemented in a form of hardware or a form of a software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working process of the units and modules in the above system may refer to the corresponding process in the foregoing method embodiment, which is not described herein again.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus/electronic device and method may be implemented in other manners. For example, the apparatus/electronic device embodiments described above are merely illustrative, e.g., the division of the modules or units is merely a logical function division, and there may be additional divisions in actual implementation, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection via interfaces, devices or units, which may be in electrical, mechanical or other forms.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated modules/units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the present invention may implement all or part of the flow of the method of the foregoing embodiment, or may be implemented by instructing related hardware by a computer program, where the computer program may be stored in a computer readable storage medium, and the computer program may implement the steps of the method embodiment of fault identification of each photovoltaic module when executed by a processor. Wherein the computer program comprises computer program code which may be in source code form, object code form, executable file or some intermediate form etc. The computer readable medium may include: any entity or device capable of carrying the computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), an electrical carrier signal, a telecommunications signal, a software distribution medium, and so forth. It should be noted that the computer readable medium may include content that is subject to appropriate increases and decreases as required by jurisdictions in which such content is subject to legislation and patent practice, such as in certain jurisdictions in which such content is not included as electrical carrier signals and telecommunication signals.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention.
Claims (9)
1. The mechanical load performance test method of the photovoltaic module is characterized by comprising the following steps of:
performing a first power test, a first appearance test and a first insulation test on the target photovoltaic module in a dry environment to generate an initial power test result, an initial appearance test result and an initial insulation test result;
if the initial power test result, the initial appearance test result and the initial insulation test result are all qualified results, carrying out at least one round of following wet environment test on the target photovoltaic module:
s1, sprinkling water for a first preset time on the front and back surfaces of a target photovoltaic module for the first time, then applying a test load and a system voltage with preset times to the target photovoltaic module for a second preset time upwards, recording a resistance value and a deformation displacement value of the target photovoltaic module, and generating an intermediate insulation test result and an intermediate appearance test result of the target photovoltaic module according to the recorded resistance value and deformation displacement value; if the intermediate insulation test result and the intermediate appearance test result in the step S1 are both qualified results, continuing to carry out the step S2, otherwise, generating a test result with unqualified mechanical load resistance of the target photovoltaic module; s2, spraying water for the first preset time on the front and back surfaces of the target photovoltaic module for the second time, then applying a test load and a system voltage with preset multiples to the target photovoltaic module for the second preset time, recording the resistance value and the deformation displacement value of the target photovoltaic module again, and generating an intermediate insulation test result and an intermediate appearance test result of the target photovoltaic module again according to the recorded resistance value and deformation displacement value of the target photovoltaic module again, wherein the sprayed water is rainwater, snowwater, tap water or purified water;
If all the intermediate insulation test results and the intermediate appearance test results in at least one round of wet environment test are qualified results, performing a final power test on the target photovoltaic module in a dry environment to generate a final power test result;
generating a mechanical load resistance test result of the target photovoltaic module according to the initial power test result and the final power test result;
the method for testing the target photovoltaic module in the following wet environment comprises the following steps:
if the two intermediate insulation test results and the two intermediate appearance test results of the first round of wet environment test are qualified results, the second round of wet environment test is carried out on the target photovoltaic module;
and if the two intermediate insulation test results and the two intermediate appearance test results of the second round of wet environment test are both qualified results, performing a third round of wet environment test on the target photovoltaic module.
2. The method for testing mechanical load performance of a photovoltaic module according to claim 1, wherein:
if the initial power test value in the initial power test results is larger than a preset power threshold value, the initial power test results are qualified results, otherwise, the initial power test results are unqualified results;
If the initial appearance test result is that the preset appearance defect does not exist, the initial appearance test result is a qualified result, otherwise, the initial appearance test result is a disqualified result;
if the initial insulation value in the initial insulation test result is larger than a preset insulation threshold value, the initial insulation test result is a qualified result, otherwise, the initial insulation test result is a disqualified result.
3. The method for testing mechanical load performance of a photovoltaic module according to claim 1, wherein: after the generating the initial power test result, the initial appearance test result, and the initial insulation test result, the method further includes:
and if the initial power test result, the initial appearance test result and the initial insulation test result have unqualified results, generating a test result with unqualified mechanical load resistance of the target photovoltaic module.
4. The method for testing mechanical load performance of a photovoltaic module according to claim 1, wherein generating the test result of mechanical load resistance performance of the target photovoltaic module according to the initial power test result and the final power test result comprises:
Generating a power attenuation rate according to the initial power test result and the final power test result;
and if the power attenuation rate is smaller than the preset attenuation threshold, generating a test result with qualified mechanical load resistance of the target photovoltaic module, otherwise, generating a test result with unqualified mechanical load resistance of the target photovoltaic module.
5. The method of claim 1, wherein prior to said performing the first power test, the first appearance test, and the first insulation test on the target photovoltaic module in the dry environment, the method comprises:
and fixing the target photovoltaic module on a mechanical load testing machine according to a preset fixing mode, and enabling the sucker of the mechanical load testing machine to be uniformly adsorbed on the surface of the target photovoltaic module.
6. The method for testing mechanical load performance of a photovoltaic module according to claim 5, comprising:
when water is sprayed on the front and back surfaces of the target photovoltaic module for a first preset time, other surfaces of the target photovoltaic module except for the positions adsorbed by the suckers are completely covered by water;
and when water is sprayed on the front and back surfaces of the target photovoltaic module for a first preset time for the second time, other surfaces of the target photovoltaic module except the positions adsorbed by the suckers are completely covered by water.
7. The method of claim 5, further comprising, prior to performing at least one round of wet environment testing on the target photovoltaic module:
and resetting the displacement testing device of the mechanical load testing machine.
8. The method for testing mechanical load performance of a photovoltaic module according to claim 1, wherein the preset multiple is 1.
9. A test device for mechanical load performance of a photovoltaic module, comprising:
the initial testing module is used for performing a first power test, a first appearance test and a first insulation test on the target photovoltaic module in a dry environment to generate an initial power test result, an initial appearance test result and an initial insulation test result;
the intermediate test module is used for carrying out at least one round of following wet environment test on the target photovoltaic module when the initial power test result, the initial appearance test result and the initial insulation test result are all qualified results:
s1, sprinkling water for a first preset time on the front and back surfaces of a target photovoltaic module for the first time, then applying a test load and a system voltage with preset times to the target photovoltaic module for a second preset time upwards, recording a resistance value and a deformation displacement value of the target photovoltaic module, and generating an intermediate insulation test result and an intermediate appearance test result of the target photovoltaic module according to the recorded resistance value and deformation displacement value; if the intermediate insulation test result and the intermediate appearance test result in the step S1 are both qualified results, continuing to carry out the step S2, otherwise, generating a test result with unqualified mechanical load resistance of the target photovoltaic module; s2, spraying water for the first preset time on the front and back surfaces of the target photovoltaic module for the second time, then applying a test load and a system voltage with preset multiples to the target photovoltaic module for the second preset time, recording the resistance value and the deformation displacement value of the target photovoltaic module again, and generating an intermediate insulation test result and an intermediate appearance test result of the target photovoltaic module again according to the recorded resistance value and deformation displacement value of the target photovoltaic module again, wherein the sprayed water is rainwater, snowwater, tap water or purified water;
The final testing module is used for carrying out final power testing on the target photovoltaic module in a dry environment when all intermediate insulation testing results and intermediate appearance testing results in at least one round of wet environment testing on the target photovoltaic module are qualified results, so as to generate a final power testing result;
the test result generation module is used for generating a test result of the mechanical load resistance of the target photovoltaic module according to the initial power test result and the final power test result;
the intermediate test module is specifically configured to:
if the two intermediate insulation test results and the two intermediate appearance test results of the first round of wet environment test are qualified results, the second round of wet environment test is carried out on the target photovoltaic module;
and if the two intermediate insulation test results and the two intermediate appearance test results of the second round of wet environment test are both qualified results, performing a third round of wet environment test on the target photovoltaic module.
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